Ben Stiller is traveling to London in “Night at the Museum: Secret of the Tomb” and hanging out with former “Downton Abbey” star Dan Stevens as famed knight Sir Lancelot.

The first trailer (above) for the upcoming comedy shows some of the antics audiences have to look forward to, while filling them in on the plot: The magic tablet that brings history alive at night is losing its power, so Stiller’s character must team up with a few favorite mannequins to figure out why.